Patent US4247655A successfully refreshed from Google Patents.
US4247655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rigid and semiflexible polyurethane foams produced with phenol-aldehyde-amine resins
Assignee: Lyondell Chemical Technology LP
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Filing: 1979-09-18
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Granted: 1981-01-27
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Expires: 1999-09-18
Abstract
Abstract Rigid and semiflexible polyurethane foams having superior flame retardant properties are produced by incorporating into the pre-foam formulation the reaction product of a phenol, an aldehyde, and an aromatic amine.
Inventors
- 👤 Raymond A. Dunleavy
- 👤 James A. McClanahan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:30
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/4009; C08G18/4027; C08G18/54; C08G18/544
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
112 words
A process for producing a rigid or semiflexible polyurethane foam which comprises forming and curing reaction mixture consisting essentially of (a) a polyether polyol, or blend of polyether polyols, having a hydroxyl number of greater than 100 and a functionality of at least 3 and less than 8, (b) the reaction product of: (I) a phenol which has at least one unsubstituted reactive position on the aromatic nucleus, (II) an aldehyde, and (III) an aromatic amine, (c) an aromatic polyisocyanate in an amount which provides from 0.8 to 1.6 isocyanate groups per active hydrogen group in the reaction mixture, (d) a blowing agent, (e) a surfactant, and (f) a flame retardant additive.
Claim 2
Dependent Claim
112 words
A process for producing a rigid or semiflexible polyurethane foam which comprises forming and curing reaction mixture consisting essentially of (a) a polyether polyol, or blend of polyether polyols, having a hydroxyl number of greater than 100 and a functionality of at least 3 and less than 8, (b) the reaction product of: (I) a phenol which has at least one unsubstituted reactive position on the aromatic nucleus, (II) an aldehyde, and (III) an aromatic amine, (c) an aromatic polyisocyanate in an amount which provides from 0.8 to 1.6 isocyanate groups per active hydrogen group in the reaction mixture, (d) a blowing agent, (e) a surfactant, and (f) a flame retardant additive.
Claim 3
Dependent Claim
13 words
A rigid or semiflexible polyurethane foam produced by the process of claim 1.
Claim 4
Dependent Claim
56 words
A process as in claim 1 wherein component (b) of the formulation is the reaction of: (I) phenol, (II) formaldehyde, and (III) aniline, wherein the molar ratio of (I) to (III) ranges from about 6:1 to about 1:6 and wherein the molar ratio of (I) plus (III) to (II) ranges from about 6:1 to about 1.2:1.
Claim 5
Dependent Claim
13 words
A rigid or semiflexible polyurethane foam produced by the process of claim 3.
Claim 6
Dependent Claim
19 words
A process as in any one of claims 1, or 3 wherein the product is a rigid polyurethane foam.
Claim 7
Dependent Claim
11 words
A rigid polyurethane foam produced by the process of claim 5.
References Cited (Backward Citations)
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Cited
US3558529A
Cited
US3514144A
Cited
US3586649A
Cited
US3580869A
Cited
US4107106A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-27 | 1984-07-28 | 1985-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-27 | 1988-07-28 | 1989-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-27 | 1992-07-28 | 1993-01-27 | $7700.00 | Window Closed / Lapsed |